/*
 * Copyright (C) 2014 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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#include "flutter/sky/engine/platform/geometry/FloatBoxTestHelpers.h"

#include "flutter/sky/engine/platform/geometry/FloatBox.h"
const static float kTestEpsilon = 1e-6;

void blink::PrintTo(const FloatBox& box, ::std::ostream* os) {
  *os << "FloatBox(" << box.x() << ", " << box.y() << ", " << box.z() << ", "
      << box.width() << ", " << box.height() << ", " << box.depth() << ")";
}

bool blink::FloatBoxTest::ApproximatelyEqual(const float& a, const float& b) {
  float absA = ::fabs(a);
  float absB = ::fabs(b);
  float absErr = ::fabs(a - b);
  if (a == b)
    return true;

  if (a == 0 || b == 0 || absErr < std::numeric_limits<float>::min())
    return absErr < (kTestEpsilon * std::numeric_limits<float>::min());

  return ((absErr / (absA + absB)) < kTestEpsilon);
}

bool blink::FloatBoxTest::ApproximatelyEqual(const FloatBox& a,
                                             const FloatBox& b) {
  if (!ApproximatelyEqual(a.x(), b.x()) || !ApproximatelyEqual(a.y(), b.y()) ||
      !ApproximatelyEqual(a.z(), b.z()) ||
      !ApproximatelyEqual(a.width(), b.width()) ||
      !ApproximatelyEqual(a.height(), b.height()) ||
      !ApproximatelyEqual(a.depth(), b.depth())) {
    return false;
  }
  return true;
}

::testing::AssertionResult blink::FloatBoxTest::AssertAlmostEqual(
    const char* m_expr,
    const char* n_expr,
    const FloatBox& m,
    const FloatBox& n) {
  if (!ApproximatelyEqual(m, n)) {
    return ::testing::AssertionFailure()
           << "       Value of:" << n_expr << std::endl
           << "         Actual:" << testing::PrintToString(n) << std::endl
           << "Expected Approx:" << m_expr << std::endl
           << "       Which is:" << ::testing::PrintToString(m);
  }
  return ::testing::AssertionSuccess();
}

::testing::AssertionResult blink::FloatBoxTest::AssertContains(
    const char* m_expr,
    const char* n_expr,
    const FloatBox& m,
    const FloatBox& n) {
  FloatBox newM = m;
  newM.expandTo(n);
  if (!ApproximatelyEqual(m, newM)) {
    return ::testing::AssertionFailure()
           << "        Value of:" << n_expr << std::endl
           << "          Actual:" << testing::PrintToString(n) << std::endl
           << "Not Contained in:" << m_expr << std::endl
           << "        Which is:" << ::testing::PrintToString(m);
  }
  return ::testing::AssertionSuccess();
}
